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CVE-2021-34433

Good to know:

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Date: August 20, 2021

In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.

Language: Java

Severity Score

Related Resources (3)

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281
https://nvd.nist.gov/vuln/detail/CVE-2021-34433
https://www.mend.io/vulnerability-database/CVE-2021-34433

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Key Exchange without Entity Authentication

CWE-322

Top Fix

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Upgrade to version org.eclipse.californium:scandium:2.6.5,3.0.0-M4

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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